No pull in 4th gear

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S2CUF
registered user
Posts: 28
Joined: Mon Jan 18, 2016 12:53 pm
Main scooter: Lambretta li150 special
Contact:

So yesterday I finally got my li150 with 175 kit
Mot'd. After not I took it for a good run. Now she pulls well in 1st and 2nd. Not bad in 3rd. But has nothing more to give when out in 4th. Simply stays at same speed but revs drop off making it quieter. Any ideas why??? Simple ideas? I'm presuming it didn't run like this when my dad had it... But unfortunately he ain't around to ask..
bristolmod
registered user
Posts: 1741
Joined: Wed Jan 07, 2009 8:42 am
Main scooter: Lambretta TV175 S3- what else!
Location: Bali-Hai bar, Locarno Ballroom Bristol, 1967!- mines a Brown Split!!
Contact:

could be a million things. Some 175 kits are crap and produce less power than a standard 150. Where did you get the kit from?
Scootering since 1968.
S2CUF
registered user
Posts: 28
Joined: Mon Jan 18, 2016 12:53 pm
Main scooter: Lambretta li150 special
Contact:

I'll did out the details later. And reply.
nuttyboy
registered user
Posts: 52
Joined: Sat Jul 17, 2010 6:13 pm
Main scooter: lambretta
Contact:

What gearbox you using

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mick1
registered user
Posts: 1292
Joined: Sun Dec 04, 2011 7:43 pm
Main scooter: Li Avanti 225
Location: York
Contact:

Need a bit more info'

Did you run it with the 150 or have you just got it ?
What exhaust (potentially blocked or not suited to the kit) ?
What carb' and jetting are you using (worth checking if the air filter's blocked) ?
What gearbox/crown/front sprocket ?

The 175 kits are very hit and miss, port timings all over the place and poor compression ratios (some ok others terrible).

Good luck
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